Additional fix: Narrowing range of version of DBD::Pg to take care.

src/lib/Sympa/DatabaseDriver/PostgreSQL.pm

@@ -72,10 +72,10 @@ sub quote {
     my $string    = shift;
     my $data_type = shift;
 
-    # Set utf8 flag, because DBD::Pg 3.x needs utf8 flag for input parameters
-    # even if pg_enable_utf8 option is disabled.
-    unless (0 == index($DBD::Pg::VERSION, '2')
-        or (ref $data_type eq 'HASH' and $data_type->{pg_type})) {
+    # Set utf8 flag. Because DBD::Pg 3.3.0 to 3.5.x need utf8 flag for input
+    # parameters, even if pg_enable_utf8 option is disabled.
+    if ($DBD::Pg::VERSION =~ /\A3[.][3-5]\b/
+        and not(ref $data_type eq 'HASH' and $data_type->{pg_type})) {
         $string = Encode::decode_utf8($string);
     }
     return $self->SUPER::quote($string, $data_type);
@@ -85,9 +85,9 @@ sub do_prepared_query {
     my $self  = shift;
     my $query = shift;
 
-    # Set utf8 flag, because DBD::Pg 3.x needs utf8 flag for input parameters
-    # even if pg_enable_utf8 option is disabled.
-    unless (0 == index($DBD::Pg::VERSION, '2')) {
+    # Set utf8 flag. Because DBD::Pg 3.3.0 to 3.5.x need utf8 flag for input
+    # parameters, even if pg_enable_utf8 option is disabled.
+    if ($DBD::Pg::VERSION =~ /\A3[.][3-5]\b/) {
         my @params;
         while (scalar @_) {
             my $p = shift;